Artefacts when exporting model with holes to keyshot
Solution to this problem:

Select all inner edges and bevel them. Dont forget that you should bevel all of which I highlighted with pink,red and blue to avoid dissapointments in texture and strange reflections when importing to keyshot


Bevel all outer edges, including sides, top and bottom edges highlighted with PINK, dont worry about ORANGE ones, we dont need them.


This step is important because Keyshot doesn't like Ngons and Quads, so always do this step.


UV unwrap with smart UV project


Shade smooth an object and turn on autosmooth



And then you should end up with quality model without any strange artefacts or reflections ready for adding texture in Keyshot.



Hope this helps someone in the future!